What I personally dislike about Swift is the change in mental context when dealing with the combination of C/C++ and Swift code. Plenty of nontrivial apps use s

What I personally dislike about Swift is the change in mental context when dealing with the combination of C/C++ and Swift code. Plenty of nontrivial apps use significant amounts of C and/or C++ libraries in some way. The switch when dealing with a combination of C/C++ and Objective-C source was not really a problem. But trying to interface a C++ library into a Swift application is less than a fun experience. Personally, while the language is fresh and seems pretty good (it has some great additions), I still prefer Objective-C. I guess I'm waiting for better integration with existing libraries.